Simultaneous Nadir Overpasses (SNOs) between FY3D and LANDSAT-8
TLE Epoch: 2020 1 21.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 01/23/2020   09:25:32   ( -70.71,-144.98) 01/23/2020   09:26:43  ( -70.65,-144.45)   20.73                71
 01/23/2020   10:16:12   (  70.39,  22.85) 01/23/2020   10:16:13  (  70.38,  22.79)    2.32                 1
 01/23/2020   11:06:53   ( -70.29,-169.67) 01/23/2020   11:05:43  ( -70.27,-169.73)    2.91                70
 01/26/2020   01:41:58   ( -70.82, -29.26) 01/26/2020   01:43:09  ( -70.72, -28.46)   31.24                71
 01/26/2020   02:32:36   (  70.39, 138.74) 01/26/2020   02:32:40  (  70.39, 138.69)    1.73                 4
 01/26/2020   03:23:17   ( -70.29, -53.78) 01/26/2020   03:22:10  ( -70.29, -53.83)    1.91                67
 01/28/2020   17:58:25   ( -70.93,  86.46) 01/28/2020   17:59:35  ( -70.84,  87.60)   42.90                70
 01/28/2020   18:49:01   (  70.41,-105.38) 01/28/2020   18:49:08  (  70.40,-105.41)    1.33                 7
 01/28/2020   19:39:42   ( -70.30,  62.11) 01/28/2020   19:38:38  ( -70.30,  62.07)    1.51                64
 01/31/2020   10:14:52   ( -71.04,-157.83) 01/31/2020   10:16:01  ( -70.96,-156.34)   55.01                69
 01/31/2020   11:05:26   (  70.42,  10.50) 01/31/2020   11:05:36  (  70.41,  10.48)    1.57                10
 01/31/2020   11:56:07   ( -70.31, 178.00) 01/31/2020   11:55:06  ( -70.31, 177.96)    1.29                61
 02/03/2020   02:31:19   ( -71.16, -42.13) 02/03/2020   02:32:27  ( -71.07, -40.28)   67.27                68
 02/03/2020   03:21:51   (  70.44, 126.37) 02/03/2020   03:22:04  (  70.41, 126.36)    2.90                13
 02/03/2020   04:12:32   ( -70.32, -66.12) 02/03/2020   04:11:34  ( -70.31, -66.15)    1.41                58